package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;
@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {

	@Autowired
	private ShoppingCartMapper shoppingCartMapper;
	@Autowired
	private DishMapper dishMapper;
	@Autowired
	private SetmealMapper setmealMapper;

	/**
	 * 添加购物车
	 * @param shoppingCartDTO
	 */
	public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
		//判断当前加入到购物车的商品是否已经存在
		ShoppingCart shoppingCart = new ShoppingCart();
		BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
		Long userId = BaseContext.getCurrentId();
		shoppingCart.setUserId(userId);

		List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
		//如果已经存在，数量加一
		if (list != null && list.size() > 0){
			ShoppingCart cart = list.get(0);
			cart.setNumber(cart.getNumber() + 1);
			shoppingCartMapper.updateNumberById(cart);
		} else {
			//如果不存在，需要插入一条购物车数据

			//判断本次添加导购物车的时菜品还是套餐
			Long dishId = shoppingCartDTO.getDishId();
			if (dishId != null){
				//本次添加到购物车的是菜品
				Dish dish = dishMapper.getById(dishId);
				shoppingCart.setName(dish.getName());
				shoppingCart.setImage(dish.getImage());
				shoppingCart.setAmount(dish.getPrice());
			} else {
				//本次添加到购物车的是套餐
				Long setmealId = shoppingCartDTO.getSetmealId();

				Setmeal setmeal = setmealMapper.getById(setmealId);
				shoppingCart.setName(setmeal.getName());
				shoppingCart.setImage(setmeal.getImage());
				shoppingCart.setAmount(setmeal.getPrice());
			}
			shoppingCart.setNumber(1);
			shoppingCart.setCreateTime(LocalDateTime.now());
			shoppingCartMapper.insert(shoppingCart);
		}
	}

	/**
	 * 查看购物车
	 * @return
	 */
	public List<ShoppingCart> showShoppingCart() {
		//获取当前微信用户id
		Long userId = BaseContext.getCurrentId();
		ShoppingCart shoppingCart = new ShoppingCart().builder()
				.userId(userId)
				.build();
		List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
		return list;
	}

	/**
	 * 清空购物车
	 */
	public void cleanShoppingCart() {
		//获取当前微信用户id
		Long userId = BaseContext.getCurrentId();
		shoppingCartMapper.deteleByUserId(userId);
	}
}
